Apparatus for making bisulfite liquor, using pyrites.



DREWSEN. APPARATUS FOR MAKING BISULPITE LIQUOR, USING PYRITES.

APPLICATION FILED OUT. 11, 1910. V

Patented Dec, 1, 1914.

INVENTOH 1/ I I wlrA/ssz isz/ OHNEYS sTAT s wast ca s.

vrceo DREWSEN, on NEW roux, N. Y. I

To allachom it ma concern; I

Be it known t at I, V ce-o Dnuwsmr, a

citizenof the United States, and resident oithe boroughof Brooklyn, countyof Kings, city and State of New York, have made certain new and useful Inventions Relating to Apparatus for Making Bisulfite Liquor, Usin Pyrites, 'ofwhich the following is a speci cation, taken in connection with the accompanying drawing, forming part of the'same- This invention relates to apparatus for utilizing pyrites or other low grade sulfur material for manufacturing bisulfite liquors,

v suchas" bisulfite of lime-or the like for use in connection with paper making, This may be effected, for example, by passing the l sulfurous gases from the burning pyrites through absorptionrtowers after scrubbing and cooling the same and passing. the sulfurousli'quor produced in said absorption tow- 'ers through an evaporating pan heated by i the freshly formed hot sulfurous gases from the pyrites to'drive the concentrated sul- 5 furous gases'therefrom. The lime or bis'ulfite liquor' may 'be" passed successively through] a. series of bisulfite tanks while passing the weak sulfuro-us gases successively through a number of said tanks in the opposite directiontothe flow of liquor therethrough and feeding the concentrated sulfurous gases into the first'of said tanks 5 to act upon the bisulfite liquor after absorption of the weakergases.

The accompanyingdrawing shows in a diagrammatic way an illustrative embodiment of apparatus adapted for carrying out this invention.

In, the illustrative form of apparatus shown in the drawing, one or moresuitable burners, such as 1, 2,.may be used for burning the pyrites or other sulfurous material, preferably with limited quantities of air so as to produce as concentrated sulfurous gases as possible. The burners may be in the form "of McDougal furnaces provided with a plurality of shelves such as 3 and the sulfurous gases discharged from theburner passages 5, 6 may pass through the fluel into a suitable centrifugal fan or other blower 7 sons to be discharged through the passage 8 into a: scrubber 9 of any desired form.- As indicated, the scrubber may be ar- Speciflcation of Letters Patent. I

arrsmrus ron'mamue BIsULFI'rE 'Lrouon, usmc Prawns.

Patented us 1, 1914.

1, Originalapplication filed December 9, 1909, Serial No. $32 ,237. Divided and this application filed October a '11, 1910. Serial No. 586,543.

ranged fora continuous circulation of the llqlldr which may be drawn by the rotary pump or other circulating device 1 0- from the lower part of the scrubber. and forced through the pipe 11 and distributer 12 so as to. be showered or sprayed down through the scrubber and remove the particles of im- 6 o purities from the gases, this continuous circulation obviating waste of the sulfurous gases absorbed in' the liquor which rapidly becomes saturated and cannot further absorb the gases. Fromthe scrubber the sulfurous gases may pass through the passage 13' into a suitable gas cooler 14 of any degases may be they may be if desired led through the passage 20 into a final absorption device such as the lime absorption tower 21for example, where practically all of the remaining sulfurodioxid may be absorbed therefrom for example by contact with the lime or other alkaline liquor used in subsequent stages of the process assaidlime liquor or other alkaline liquor passes over the distributing devices in the tower. The result is that the waste gases which are finally discharged from the discharge passage 22 may be made .tocontain so little sulfur dioxid as to be practically unobjectionable which also econ- 'c'mizes loss of available sulfurous material in this way. In order-to more effectively eliminate the last portions of the ,sulfur dioxid the fresh alkali used in forming the bisulfite may be passed through this final absorption towen by arranging a suitable circulation with the lime tank, such as50. The alkali liquor may be taken from this tank through the pipe 72 insuitable quantities governed by the valve 73 and after passing through the rotary pump or circulating device 74 may be discharged by 105 the pipe 75 into the top of the lime absorpof this'towe i; my; be ledby a suitable pipe,

I such as' '71,""back into e alkali tank.

If d'esired,-a continuous circulation of sulfurous liquor may be maintained through' the absorption towers and concentrated sul-' fur dioxid driven therefrom by'heat while the weak or exhausted sulfurous liquor,

preferably after'suitable cooling is returned and passed successively through the towers in. the opposite direction to the flow of the sulfurous gases therethrough to become againw charged with sulfur dioxid. :This may be conveniently effected by. assin the wateror weak sulfurousliquor t roug the .pipe 23 into the to of the absorption tower l8 and taking the quor from the'bottom of this tower through the pipe 24 leading to the circulating pump' '25- which forces -it through the pipe 26 into the tower 17. Any desired liquid medium preferably ofa 'ueous character which is capable of absorbing the weak sulfurous gases and allowing the same to be again eliminated therefrom may be used in thisvbisulfite liquor system: and

water may' be'efi'ectively used for this purpose. A suitable ipe, such as 27 may convey the sulfurous 'quor from the tower 17 to the pump 28 which may force it through the pipe 29 to suitable devices for heating it and. expelling the concentrated sulfurous gases therefrom. These heating devices may comprise a suitable. heating or eva o'- ratmg pan, such as the, lead pan, 35, which may be heated by the hot sulfurous gases from the burners, so that a considerable portion of this heat of combustion is utilized in this way and at the same time the desired cooling of the sulfurous gases promoted to a corresponding extent. Additional heat may be supplied to the evaporating pair in any desired way as for instance by steam coils or pipes, such as a suitable perforated steamspray pipe 36, to which steam may be admitted in the desired quantities by the valve 37 governing the steam supply. The sulfurous gases driven'oif from the liquor in the pan 35 are of course rich in sulfur divoxid and may be advantageously used in connection with the weaker gases from the burning pyrites in securing the desired action on the alkali in making the bisulfite liquor for paper manufacture, and may also be similarly used in other operations where itis desired to most economically reinforce the weak sulfurous gases .obtainable from the burning of pyrites or other low grade sulfur material. In order to further economize, heat it is desirable to introduce any suitable preheater as of the Liebig type, for example, in the sulfurous liquor circulating system, as by leadingthe sulfurous liquor from the absorption towers through the pipe 29' into the jacket of the liquor preheater.;30,

the liquor issuing from the other end of the jacket through a suitable pipe, such as 34, and passing into. the heating or evaporatin pan 35 from which it'may. be taken thro'ugfi the pipe- 38 and circulating device-39 discharging through the pipe 40 into the head 33 of the preheater. The liquor may then pass throu h the suitable-circulating tubes 37 within t e jacket and surrounded by the cool liquor therein so as to transfer a considerable portion of its heat thereto and driveofi'sulfurous gases therefrom before this liquor from the pan passes out through the pipe 41 connected with the opposite head 32. This li'q'uormay be-still further cooled age tank 51 for utilization after it is discharged from the pipe 60. The pipe 56 may connect ithe bisulfite storage tank 51 with the first bisulfite tank i7, a suitable valve such as 57 controlling the flow of liquor "therethrough-and in the case of a spraying type of bisulfite tank such as diagrammatically illustrated the liquor may be taken by the pipe 52 and after passing through the pump 53 be discharged through the pipe 54 communicating with the storage tank through the branch 58 provided with the regulating .valve 59 and also delivered through the spraying distributer 55 so as to be brought to the desired extent into contact with the gases in the tank. A similar circulating pump and connected distributer may of course be arranged in connection with the other bisulfite tanks and the pipe 61 may be used to connect the first tank l7 withthe second tank 48 and asimilar pipe 62 may allow the lime or bisulfite liquor liquor may of course be supplied to the lime tank through the pipe 76 provided with a.

to 'pass from the third tank 49. The lime v valve 69 and passtherefrom into the last bifitc tank and the amount of gas entering the a tank may be governed by a suitable valve, such as 67, in this gas passage. If desired also a similar as connection 66 may .lead to the second bisulfite tank and regulated amounts of the weak sulfurous gas admitted thereto as determined by the position of the valve *8 in this connection. trated sulfurous gases from the pr'eheater may be taken through the passages 44, .45 into the first bisulfite tank in honnection if desired with the concentrated gas from the pan which enters the assage 46' connected with the passage 45. vn this way the concentrated sulfurous gas which is rich'in sulfur dioxid entersthei first. bisulfite tank 47 reinforcing the amount of weaker sulfurous gases which may be supplied thereto di7' rectly from the cooler orother part of the system so that the bisulfite li u'or-in this first tank which has been 'acte 'upon by the weaker-gases with formation of sulfites is i finally converted into bisulfite by these enriched gases which should have twenty per cent. or so of sulfur 'dioxid therein. The

gases from: the first tank-47' may pass] through a suitable connecting passage 77 into the tank 48 to which it is desirable for some purposes to supply the larger proportion of the Weaker sulfurous gases from the cooler by suitable regulation, of the control valve 67 68. The passage 78 serves to conduct'the sulfurous gases from the-tank 48 into the tank 49 and. a similar passage 79 may discharge them therefrom.

It is of courseunderstood that this invention has been disclosed in this case, which is a divisional application; based on the disclosure of my copending application which has since matured into Patent 981,625,

granted January 17, 1911, in connection with a'number of illustrative forms, proportions,

arrangements of parts, and steps, to the de-' tails of which disclosure the invention is not of course to be limited, but

What is claimedas new and what is desired to be secured by Letters Patent is set forth in the appended claims.

1. The apparatus for manufacturing, bi-

sulfite for paper making or the like com prising a burmer for producmgjweak sulfurous gases, a scrubber having continuous closed water circulation, a gas cooler, means topass said weal? sulfurous v gases in succession through said'scrubber and cooler, a

series 01; absorption towers and passages to pass a portion of the weak sulfurousgases from said cooler successively through a plurality of said absorption towers-means to substantially eliminate the sulfur dioxid from the exhausted gases from said absorption towers by contact with alkali liquor, a

sulfurous liquor system comprising means to continuously circulate aqu'eous' sulfurou's liquor through said absorption towers'in the opposite direction to the feedjof gases therethrough, a heating pan in -said sulfurous liquor system and means to heat said panby 'the hot weaksulfurous gases, additional means to heat said pan anddrive ofi" con- The concencentrated sulfurous gasestherefrom,-a bisiilfite system comprising a plurality of tanks j having means to bring the bisulfite liquor 1 during its conversion into'contact with the gases therein,'means to mix the concentrated sulfurous gases driven off from the sulfurous liquor with another-portion of such weak sulfurous gases andto allow the mixtureto act on-the bisulfite liquor in one of said hisulfite'tanksadjacent the first of the series, means to feed the sulfurous gases in succession through said bisulfite, tanks and means to feed the bisulfite or lime liquor in succession through alnumber of said bisulfite tanks in the opposite direction to the feed of sulfurous gases therethrough.

2. The apparatus'for bisulfite manufac- I ture comprising a burner for producing hot weak sulfurous gases, means to cool said gases, a sulfurous'liquor'system comprising absorption means through which aqueous sulfurous liquor is circulated, passages to pass a portion of the weak sulfurous gases through said absorption'nieans for absorption. by the liquor therein, a heating, pan in said sulfu'rous liquor system and means to supply heat to said pan from the hot weak sulfurous gases to drive off concentrated sulfurous'gases from the liquor in said pan, a bisulfite system comprising a plurality of bisulfite tanks having means. to bring the bisulfiteiliquor during the conversion into contact 'with the gases therein, means to mix the concentrated sulfurous gasesfrom said pan with another portion of suchweak sulfurous gases and to allow the mixture to act on the bisulfite liquor in one of said'bisulfite tanks adjacent the first of the series .to act upon the bisulfite liquor therein after vits absorption of weaker -gases, means to feed additional weak sulfurous gases from said cooler to one of said bisulfite tanks adjacent the 'first of the series and means to' feed the bisulfite or lime liquor in succession through a number of said. bisulfite tanks in the opposite direction to the feed of sulfurous gases therethrough.

3. In apparatus for manufacturing bisulousgases, a sulfurous liquorcirculation system compris ng'absorption means, passages to pass a portion of the weak sulfurous gases through said absorption means to absorbsulfur dioxid therefrom in the circulating sulfurous. liquor, a heating device'in said.

fite, a burner for producing hot weak sulfurbisulfite tanks adjacent the head of the series and means to feed bisulfite liquor successively through a number of said bisulfite tanks in the opposite direction to the feed,

of sulfurous gases therethrough.

2 4. The apparatus for manufacturing bisulfite comprising aburner for producing weak sulfurous gases, a sulfurous liquor system comprising absorption means, passages to pass a portion of theweak sulfurous gases through said absorption means to absorb sulfur dioxid in the aqueous circulating liquor, a heating device in said liquor system and means to heat the sulfurous liquor. therein and drive ofl therefrom concentrated sulfurous gases, a bisulfite system comprising a plurality of bisulfite tanks, each having means to spray the bisulfite liquor therein, means to supply the concentrated-sulfurous gases from said sulfurous liquor system and another portion of such weaksulfurous gases to said series of bisulfite tanks adjacent the head thereof, and, toepass such gases in succession through the remainder of said series and means to feed bisulfite liquor through a number'of said bisulfite tanks in-the opposite direction to the feed a of sulfurous gases therethrough.v

5. The apparatus for manufacturing bisulfite which comprises a burner for producing Weak sulfurous gases, a sulfurous liquor system comprising absorption means, passages to pass a portion of the weak sulfurous gases from said burner through said absorption means to absorb sulfur dioxid therefrom in the circulating aqueous sulfurous liquor, a heating device in said sulfurous liquor-system, means to drive off concentrated sulfurous gases from said sulfurous liquor before returning the same to said absorption means, a bisulfite system comprising a circulating stream of blsulfite liquor and means to supply the concentrated sulfurous gases from said sulfurous liquor system and another portion of such Weak sulfurous gases to said bisulfite stream'to act upon the bisulfite liquor after action of weaker gases thereon.

6. The apparatus for manufacturing bisulfite comprising a burner for producing weak sulfurous :gases, a sulfurous liquor system comprising absorption means, passages to pass a portion of the Weak sulfurous gases through said absorption means to absorb sulfur dioxid in the circulating aqueous sulfurous liquor, a heating device in said sulfurous'liquor system to drive concentrated su'lfurous gases from the liquortherein, a bisulfite system comprising means to feed therethrough a stream of bisulfite liquor, means to supply Weak 'sulfurous gases from said burner to said bisulfite streamand means to supply concentrated sulfurous gases from said sulfurous liquor system to said bisulfite stream to mix with another portionof such weak gases and,

thereupon act on such bisulfite stream. after action of weaker gases thereon.

7. The apparatus for manufacturing .bisulfite comprising a burner for producing 'llOt weak sulfurous gases, a sulfurous liquor said burner, a bisulfite system comprising means to feed therethrough a stream of bisulfite liquor, means to supply Weak sulfurous gases to such bisulfite stream and means to supply concentrated sulfurous gases from said sulfurous liquor system, mix with another portion of such" Weak gases and thereupon act on said bisulfite stream.

8. The apparatus for manufacturing hi sulfite comprising means for producing weak sulfurous gases, a sulfurous liquor systemrcomprising absorption means, passages to pass a portion of said weak sulfurous gases through said absorption means for absorption by the circulating sulfurous liquor therein, an eliminating device in said sulfurous liquor system to eliminate concentrated sulfurous gases from the liquor therein, a bisulfite system and means to allow a mixture of said Weak sulfurous gases andsaid concentrated sulfurous gases to act on the bisulfite liquor in said bisulfite sys tem to effect the complete production of hisulfite therein. I

9. The apparatus for producing and utilizing sulfurous gases comprising means to produce Weak sulfurous gases which are incapable by action on the bisulfite liquor of forming a product ofthe desired strength,

a sulfurous liquor system comprising absorption means, means to pass a portion of said weak sulfurous gases through said absorption means for absorption by the sulfurous liquor therein, an eliminating device in said sulfurous liquor system to eliminate concentrated sulfurous gases from the liquor therein, a bisulfite svstem comprising means to feed therethrough a stream of bisulfite liquor capable of combining with sulfurous gases and means to allow a mixture of such weak sulfurous gases and of such concentrated sulfurou's gases from said sulfurous liquor system to act on the bisulfite liquor in said bisulfite system to finally subject said bisulfite liquor to the action of reinforced sulfurous gases to effect its desired conversion.

10. The apparatus for manufacturing bisulfite comprising a burner for producing I weak sulfurous into contact with said lime or bisulfite Ii by action on the line or bisulfite liquor of forming bisulfite of the desired stren h,

the hot weak sulfurous gases, a sulfurous' liquor system comprising absorption means, passages to pass a portion of said weak sulfurous gases through saidiabsorption means for absorption by the continuously circu-' lating sulfurous liquor therein, a heating device in the said sulfurous liquor system receiving heat from the hot sulfurous gases and eliminating concentrated sulfurous gases from the sulfurous liquor therein, a

prehe'ater in said sulfurous liquor system heating the stronger sulfurous liquor by the liquor from said heating'device and thereby eliminating concentrated sulfurous gases from said stronger liquor, a bisulfite system comprising tanks containing bisulfite liquor, means to mix concentrated .su lfurous gases from said sulfurous liquor sys tem with another portion of such weak sulfurous gases and to allow the mixture to act on said bisulfite liquor.

which I are incapable I r The apparatus for manufacturing bisulfite comprising a burner for producing hot weak sulfurous gases and a gas cooler to'cool the same, a sulfuroujsliquor system comprising means to circulate aqueous sulfurous liquor and absorb sulfurous gases from a portion of said weak sulfurous ases from said burner, a heating panin sai sulfurous liquor system and means to heat said pan by theJhot weak sulfurous gases from said burner and drive off concentrated sulturous gases from said aqueous liquor, a liquor preheater in said aqueous sulfurous liquor systemto preheat the liquor supplied to said pan by the hot liquor dis charged therefrom, a bisulfite system comprising a plurality oftanks having means to bring the bisulfite liquor during its conversion into contact with the gases therein, means to mix the concentrated sulfurous gases driven ofifromthe sulfurous liquor 'with another portion of such weak sulfurous gases and to allow the mixture to act on the bisulfite liquor in one of said bisulfite tanks adjacent the first of the series to complete therein the production of bisulfite liquor by the action of such reinforced sulfurous gases, means to feed the sulfurous gases in succession through said bisulfite tanks and means to feed the bisulfite or lime liquor in succession through a number of said bisulfite tanks in the opposite direction to the feed of sulfurous gases therethrough.

IVIGGO DREWSEN.

HARRY L. Duncan, Jassm B. KAY. 

